Flexible connection for pumping mechanisms.



W. A. PAINB. I FLEXIBLE CONNECTION FOR PUMPING MECHANISMS..

Patented July 27, 1909.

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FLEXIBLE C(JNNECTIGN FOB TE'UMPING MECHANIfiIVZS.

Specification of Letters Patent.

Application filed July 19, 1998.

Patented July 27, 1909.

Serial No. 442,938.

To all whom it may concern:

Be it known that 1, WILLIAM A. lPArNE, a citizen of the United States,residing at Orcutt, in the county of Santa Barbara, State of California,have invented certain. new and useful Improvements in FlexibleConnections for Pumping Mechanism; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such asWill enable others skilled in the art to which it appertains to make anduse the same.

The invention relates to a flexible connection for pumping mechanism andis par ticularly adapted for oil and the like wells.

The primary object of the invention is the provision of a flexibleconnection between the walking beam and the piston rod of pumpingmechanisms in which the piston at the end of its up-strolre is retractedto thereby keep the lifting cable taut.

Another object of the invention is the provision of a flexibleconnection for pumping mechanism which comprises a removable casing orshell fitted within the pump tube and a spring tensioned slidable pistonrod associated with the casing or shell and a flexible connectionbetween the piston rod and a Walking beam of pumping mechanism wherebythe rodmay be actuated.

With these and other objects in view the invention consists in theconstruction, combination and arrangement of parts as will behereinafter described in detail and as illustrated in the accompanyingdrawings which disclose the preferred form of embodiment of theinvention.

It is to be understood that changes, variations and modifications may bemade such as come properly within the scope of the claims hereuntoappended Without departing from the spirit of the invention.

In the drawings :Figure 1 is a view of a portion of a walking beam withthe well tube in section and the invention applied thereto. Fig. 2 is asectional view of the flexible connection removed from its workingbarrel. Fig. 3 is a longitudinal sectional view with the piston rod in araised position. Fig. 4 is a transverse sectional view. Fig. 5 is afurther transverse sectional view.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

In the drawings, the numeral designates a walking or rocking beam of theordinary type used in pumping mechanism and 11 the well tube sectionhaving connected thereto by a threaded head coupling 12 a working barrelcomprising an upper tube se'c tion 13 connected by an enlarged couplingsection 14 to a lower terminal tube 15 the end of which. upper tubesection projects into the enlarged coupling section 14 a suitabledistance as at 16 to form an abutment termi nal.

Vi ithin the working barrel is mounted a casing or shell 17. includingspaced semicircular side sections 18 to form opposed longitudinal guideslots 19 and united at opposite extremities by guide heads 20 havingalining openings 21 into which is slidably mounted a piston rod 22 thelower extremity of which carries the ordinary form of piston not shownand the upper extremity has socured therein one end of a flexibleconnection such as a line Wire 25 which latter has its opposite endconnected to the walking beam 10 of the pumping apparatus.

The upper extremity of the casing or shell 17 has opposed offsets 26 toaccommodate locl ing jaw heads 27 having finger extensions 28 whichlatter are pivoted as at 29 to the shell or casing. The said locking jawheads 27 are held in a position to engage the abutment extremity 16 byexpansion springs 30 loosely supported in transverse openings 31 in theupper guide head 20 and the opposite extremities of said springs havingtheir bearing against the inner faces of the locking jaw heads to holdthe same spread with respect to each other whereby the casing or shell17 is held against removal from the pi e section 18 at the upperextremity of the we 1 tube.

Carried by the piston rod 22 is a coupling block or collar 32 forming abearing for a grab member 34 having oppositely disposed oarallel arms 35slidable in the elongated or longitudinal slots 19 and which arms areunited by a cross connection 36 having a central opening 37 receivingthe piston rod. The free ends of the arms form grab extremities 38 andare adapted to be brought into locking engagement with the finger extensions 28 of the locking jaw heads upon the full upward movement of thepiston rod and to bring the finger extensions 28 into locked engagementwith the grab extremities 38 and also to actuate the locking jaw heads27 to bring the same to a locked position there is provided a spreadermember 39.

It is obvious that when the piston rod is moved to its fullest extent onthe up-stroke thereof, the spreader member 39 will pass between thecontracted lower extensions 28 of the locking aw heads 27, so as to movethe latter into a position to have their outer faces lie flush with theouter surfaces of the centering members 42, so as to bring the fingerextensions 28 into a position for'locking engagement with the grabextremities 38 1 thereby momentarily maintain the spring 41 retractedand also the piston in its raised position. The piston will remain inthis position until the spreader member is lowered, so as to permit thefinger extremities to move inwardly ior disengagement with the grabmembers, v iereupon the said piston will affect its down stroke due tothe action of the expansion spring 41 acting thereon. It is apparentthat the flexible connection ill always be maintained taut when thepiston is making its up and down stroke due to the action of theexpansion spring.

thin the casing or shell 17 centrally thereof and secured to its sidesections 18 is a bearing collar forming a bearing seat for one extremityof a coiled tension spring 41 surrounding the piston rod 22 and havingits opposite end bearing against the cross connecting piece 36 of thegrab member 34 to automatically return the piston rod to seat its valveafter having been raised by a walking beam.

To properly center the casing or shell 17 within the working barrelthere is provided at opposite extremities of said casing semicircularcentering members 42 the uppermost one of which snugly fits within theupper tube 13 while the lowermost member snugly fits within the lowertube section.

between the piston rod and the walxir- What is claimed is 1. Thecombination with a walking beam and a well tube, of a working barrelconnected to said well tube, a removable casing mounted in said barrel,locking jaw heads pivotally connected to the casing to detach ably h oldthe latter in the barrel, a piston rod slidable through said casing, agrab member mounted upon said piston rod and adapted to be brought intolocking engagement with the locking jaw heads, a tension spring actingupon said piston rod, a flexible connection b beam and a spreader memberon the piston rod to actuate the locking jaw heads to permit withdrawalof the casing from the barrel.

2. In combination with a well tube and the rocking beam of pumpingmechanism, of a tube section, a casing mounted within the tube sectionand removable therefrom, pivotal locking jaws carried by said casing fordetachably connecting the latter to the tube section and having fingerextensions, a tensioned piston rod slidable through said casing, aflexible connection between the piston rod and said rocking beam, a grabmember mounted upon said piston rod and adapted for locking engagementwith the finger extensions and a spreader member carried by the pistonrod and adapted to operate upon the locking jaws whereby the same willbe brought to a position for releasing the casing from the tube section.

In testimony whereof, I afiix my signature, in presence of twowitnesses.

WILLIAM A. PAIN E.

Witnesses:

PERCIE JENKINS, C. U. ARMSTRONG.

